How to Calculate the Number of Moles of KNO3 in a Solution?

Question:

How many moles of KNO3 are in 37.5 mL of 0.445 M KNO3 solution?

Answer:

The number of moles of KNO3 in a solution can be calculated using the formula: n = M x V, where n is the number of moles, M is the molarity, and V is the volume in liters. Given that the volume is 37.5 mL and the molarity is 0.445 M, we can plug these values into the formula:

Volume = 37.5 mL in liters : 37.5 / 1000 = 0.0375 L

n = M x V

n = 0.445 x 0.0375

n = 0.0166875 moles of solute

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